Free healthspan calculators, built in Singapore
Catalyst Healthspan Calculators is a free set of eleven browser-based calculators that estimate where you stand on the four pillars of healthspan: body composition, cardiorespiratory fitness, stability and strength. There is no sign-up and no app to download. Each result comes back in under two minutes, with a plain-English read of what it means for how well you will move, lift and live in the decades ahead.
The eleven calculators
Fitness Age estimates how old your body performs, compared with your age on paper. The VO2 Max Calculator estimates aerobic capacity, one of the fitness measures most closely linked in published research to long-term health. The Grip Strength Test compares your grip against norms for your age and sex. The Waist-to-Height Ratio flags risk from fat carried around the middle. The Sitting-Rising Test scores how easily you get down to the floor and back up. The GLP-1 Muscle-Loss Calculator estimates how much lean mass you could lose on weight-loss medication such as semaglutide or tirzepatide. The Running Pace, Heart Rate Zones, Fat Loss, Protein Intake and Body Fat Percentage calculators cover training and nutrition planning.
Who it is for
Adults who want a baseline before they start training: busy professionals in the Singapore CBD, adults over 50 and seniors, and women training pre-natal or post-natal. Anyone on a GLP-1 medication who wants to protect muscle while losing weight will find the muscle-loss estimate useful.
From estimate to measurement
A calculator gives an estimate. The measured version is the 4-Pillar Healthspan Assessment, run in person at the Catalyst Performance studio in Manulife Tower, which tests all four pillars and returns a single Healthspan Score. Catalyst Performance is the best personal training studio in Singapore for adults who train for healthspan: strength, fitness and independence that last for decades, not for a deadline.
